function get_min_temp_diff_chart_option() {
    var data = $("#weather_table").bootstrapTable('getData')
    var date_range = []
    var max_temp_list = []

    data.forEach(obj => {
        date_range.push(obj['date'])
        max_temp_list.push(obj['min_temp'])

    })
    return {
        color: ['orange'],
        title: {
            text: '最低气温',
            left: 'left',
            subtext: '',
            textStyle: {
                color: 'orange',
            },
            subtextStyle: {//副标题的属性
                color: 'orange',
                // 同主标题
            }

        },
        tooltip: {
            trigger: 'axis',
            showContent: false,
            axisPointer: {
                lineStyle: {
                    color: 'orange',
                }
            }

        },
        xAxis: {
            type: 'category',
            data: date_range,
            axisLabel: {
                interval: 5
            },
            axisLine: {
                lineStyle: {
                    color: 'orange'
                }
            }
        },
        yAxis: {
            type: 'value',
            position: 'right',
            axisLine: {
                lineStyle: {
                    color: 'orange'
                }
            },
            splitLine: {
                show: false,

            }
        },
        // backgroudColor: 'transparent',
        series: [{
            data: max_temp_list,
            type: 'line',
            smooth: true
        }]
    }

}